Brushless motor with cog-shaped rotor core having poles with auxiliary magnets and shaft-fixing portions
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United States of America Patent
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Feb 13, 2018
Issued Date -
N/A
app pub date -
Oct 14, 2016
filing date -
Mar 23, 2012
priority date (Note) -
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Abstract
A brushless motor includes a first rotor core, a second rotor core, and a field magnet member. The first rotor core includes primary projecting pieces arranged along a circumferential direction at equal intervals. The second rotor core has the same shape as the first rotor core, and includes secondary projecting pieces arranged along the circumferential direction at equal intervals. The secondary projecting pieces are positioned between the primary projecting pieces that are adjacent to one another in the circumferential direction. The field magnet member is arranged between the first rotor core and the second rotor core. The field magnet member is magnetized along an axial direction to generate primary magnetic poles in the primary projecting pieces, and generate secondary magnetic poles in the secondary projecting pieces. A rotor includes the first rotor core, the second rotor core, and the field magnet member.
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